From 524d847763fc0dbf4b7e61cf96abba4e56103bab Mon Sep 17 00:00:00 2001
From: Justin Ridgewell <justin@ridgewell.name>
Date: Sat, 25 Aug 2018 20:02:32 -0400
Subject: [PATCH] Flatten TokenType class hierarchy (#8537)

`KeywordTokenType` and `BinopTokenType` were just meant to be factory
helpers, there's no reason for a class hierarchy.
---
 packages/babel-parser/src/tokenizer/types.js | 14 ++++----------
 1 file changed, 4 insertions(+), 10 deletions(-)

diff --git a/packages/babel-parser/src/tokenizer/types.js b/packages/babel-parser/src/tokenizer/types.js
index 050ca6c820..14e94d32ab 100644
--- a/packages/babel-parser/src/tokenizer/types.js
+++ b/packages/babel-parser/src/tokenizer/types.js
@@ -66,18 +66,12 @@ export class TokenType {
   }
 }
 
-class KeywordTokenType extends TokenType {
-  constructor(name: string, options: TokenOptions = {}) {
-    options.keyword = name;
-
-    super(name, options);
-  }
+function KeywordTokenType(keyword: string, options: TokenOptions = {}) {
+  return new TokenType(keyword, { ...options, keyword });
 }
 
-export class BinopTokenType extends TokenType {
-  constructor(name: string, prec: number) {
-    super(name, { beforeExpr, binop: prec });
-  }
+function BinopTokenType(name: string, binop: number) {
+  return new TokenType(name, { beforeExpr, binop });
 }
 
 export const types: { [name: string]: TokenType } = {